public class MainActivity extends AppCompatActivity {
private EditText editText;
private TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

    editText =(EditText)findViewById(R.id.xm);
    textView= (TextView) findViewById(R.id.jl);

    findViewById(R.id.pg).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent=new Intent(MainActivity.this,Main2Activity.class);
            intent.putExtra("date",editText.getText().toString()+"同学你有信心么？");
            startActivityForResult(intent,0);
        }
    });

    findViewById(R.id.exit).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            finish();
        }
    });
}





@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    textView.setText(data.getStringExtra("date"));
}
}

第二个java代码
public class Main2Activity extends AppCompatActivity {
private TextView jl;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);

    jl= (TextView) findViewById(R.id.jl);
    Intent intent=getIntent();
    jl.setText(intent.getStringExtra("date"));


}

public void onClick(View view){
    switch (view.getId()){
        case R.id.yes:
            back("有");
            break;
        case R.id.no:
            back("没有");
            break;
    }
}
public void back(String content){
    Intent intent=new Intent();
    intent.putExtra("date",content);
    setResult(1,intent);
    finish();
}
}